I have a website running on a virtual machine on my PC. I access it through m-nlp.test. Suddenly, my js files are not loaded anymore, although I have not changed anything at the website. I get the following error/warnings when I open my website with Firefox: >Loading failed for the with source “http://m-nlp.test/js/index.js?v=4”. >Content Security Policy: The page's settings blocked the loading of a resource at eval ("script-src"). and the js is not working. I don't understand why a `Content Security Policy` is raised, because the js files that I try to load are accessed from the same domain (http://m-nlp.test/). Weird facts: * The live website on the production server is working in Firefox. * m-nlp.test works in Chrome * m-nlp.test works in incognito window in Firefox. I cleared cache for m-nlp.test but it is still showing the same error. What could cause it?